1983 Vol. 1, No. 3
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Display Method:
1983, 1(3): 1-17.
Abstract:
This paper gives an csplanation of the palacogeography of the Yangzi Plat-form and the distributive characteristics and sedimentary environmenis of phos-phorites during the Doushantuo age.On the basis of geological data, palaeogeo-graphical characteristics of the Doushantuo age Yangzi Platform are shown asfollows.
This paper gives an csplanation of the palacogeography of the Yangzi Plat-form and the distributive characteristics and sedimentary environmenis of phos-phorites during the Doushantuo age.On the basis of geological data, palaeogeo-graphical characteristics of the Doushantuo age Yangzi Platform are shown asfollows.
1983, 1(3): 29-39.
Abstract:
The diagenetie processes of the carbonate rocks(ores)can be divided into four stages.
The diagenetie processes of the carbonate rocks(ores)can be divided into four stages.
1983, 1(3): 59-68.
Abstract:
Certaiin Upper Triassic sand-bodies in the middl一western Part of the Sichuan Basin possess the pasitive Grain-si rhythm with urdcrlying strata of terrestr-ial facics and ovcrlying strata of lacustrine facies. Their bedding is underdevel-oped and scouring unclear.They contain glauconite and have a grain-size prob-ability curve of three-section type, which reflects bidirectional flow ression cauce filling and conta-ins bisaltational components, quite similar to the peculiarities of the water-transgression cauce filling sand-bodies in recent stream-mouth regions. Theref-ore,they can be classified as this kind of sedimentation.They are sediments fi-lling cauce during the water-transgrained sediments formed at the intervals above the stream-mouth while the water surface of the basin was rising gradually, and the stream-mouth was retrogressing upstream.They have certain similarities and some obvious differences as compared with the river course sand-bodies and delta front stream-mouth bar sand-bodies. The mechanism is quite different, and so it is nccessary to differentiate them from each other.
Certaiin Upper Triassic sand-bodies in the middl一western Part of the Sichuan Basin possess the pasitive Grain-si rhythm with urdcrlying strata of terrestr-ial facics and ovcrlying strata of lacustrine facies. Their bedding is underdevel-oped and scouring unclear.They contain glauconite and have a grain-size prob-ability curve of three-section type, which reflects bidirectional flow ression cauce filling and conta-ins bisaltational components, quite similar to the peculiarities of the water-transgression cauce filling sand-bodies in recent stream-mouth regions. Theref-ore,they can be classified as this kind of sedimentation.They are sediments fi-lling cauce during the water-transgrained sediments formed at the intervals above the stream-mouth while the water surface of the basin was rising gradually, and the stream-mouth was retrogressing upstream.They have certain similarities and some obvious differences as compared with the river course sand-bodies and delta front stream-mouth bar sand-bodies. The mechanism is quite different, and so it is nccessary to differentiate them from each other.
1983, 1(3): 79-87.
Abstract:
The Mliddle Trinssir strata of the northwestern Sichuan Basin are charactcri-ed by the cnormous volume of carbonate rocks of algal origin.Among the carbonate rocks.dolomites are predominant and the algae are mostly blue-green.
The Mliddle Trinssir strata of the northwestern Sichuan Basin are charactcri-ed by the cnormous volume of carbonate rocks of algal origin.Among the carbonate rocks.dolomites are predominant and the algae are mostly blue-green.
1983, 1(3): 98-108.
Abstract:
Situated on the southern coast of Shangdoug Peninsula, Baishakou belongs to barrier lagoon coast. The bedforms and bedding structures of sediments in this region were investigated in 1981. The investigation shows that geomorpho-logical units, such as longshore barriers, lagoon, tidal delta, tidal channel and beach, have been developing there. In the coastal zone, there are asymmetric ripples, symmetric plane top ripples, interference ripples, backwash marks, permeate current borne rill marks, plane bed surface, surviving wave ripples, ＇D＇ erosional holes, wind-borne ripples and so on. They have formed into a special distributional series of the sediment bedforms on the barrier lagoon coast.
Situated on the southern coast of Shangdoug Peninsula, Baishakou belongs to barrier lagoon coast. The bedforms and bedding structures of sediments in this region were investigated in 1981. The investigation shows that geomorpho-logical units, such as longshore barriers, lagoon, tidal delta, tidal channel and beach, have been developing there. In the coastal zone, there are asymmetric ripples, symmetric plane top ripples, interference ripples, backwash marks, permeate current borne rill marks, plane bed surface, surviving wave ripples, ＇D＇ erosional holes, wind-borne ripples and so on. They have formed into a special distributional series of the sediment bedforms on the barrier lagoon coast.
1983, 1(3): 123-127.
Abstract:
The data from 10 lake areas can be summerized as follows: 1. Mineral assemblage is mainly illite( relative amount 80-90%), then chlorite ( relative amount 10-20% ) and little montmorillonite. 2. Chemical composition of clay minerals is characterized by rick K and Mg. In general, chemical composition is similar to the continent clay of cold-warm zone in the nonsalt formation stagel but similar to salt-bearing clay in the salt-formation stage. 3. Clay minerals are generally allothigenous, but some minerals present the transformation. The clay mineral assemblage in salt lake is like that in the soil around he lake. However, Table land Fig. 1 show that there are two kinds of chlorite in the different stages of salt lake formation. It is velieved that Mg-Fe-chlorite may be formed in the sedimentary process of the salt lake. 4. Based on the data concerned, it is considered that the climate has been getting drier and drier from ancient timea to the present. Chlorite is a significant facies indicator in the evolutionary process of salt lake.
The data from 10 lake areas can be summerized as follows: 1. Mineral assemblage is mainly illite( relative amount 80-90%), then chlorite ( relative amount 10-20% ) and little montmorillonite. 2. Chemical composition of clay minerals is characterized by rick K and Mg. In general, chemical composition is similar to the continent clay of cold-warm zone in the nonsalt formation stagel but similar to salt-bearing clay in the salt-formation stage. 3. Clay minerals are generally allothigenous, but some minerals present the transformation. The clay mineral assemblage in salt lake is like that in the soil around he lake. However, Table land Fig. 1 show that there are two kinds of chlorite in the different stages of salt lake formation. It is velieved that Mg-Fe-chlorite may be formed in the sedimentary process of the salt lake. 4. Based on the data concerned, it is considered that the climate has been getting drier and drier from ancient timea to the present. Chlorite is a significant facies indicator in the evolutionary process of salt lake.
1983, 1(3): 18-28.
Abstract:
The Upper Permian Heshan formation,the most industrial important Coal-bearing stra-ta in central Guangxi, is a main source of industrial coal.The Heshan formation iS coal-bearing formation of carbonatite type of re-stricted platform. It belongs to a special type. To study it in detail is of great significance to sedimentology, the theory of coal-formation and to the industrial production.
The Upper Permian Heshan formation,the most industrial important Coal-bearing stra-ta in central Guangxi, is a main source of industrial coal.The Heshan formation iS coal-bearing formation of carbonatite type of re-stricted platform. It belongs to a special type. To study it in detail is of great significance to sedimentology, the theory of coal-formation and to the industrial production.
1983, 1(3): 40-58.
Abstract:
Modern theory of petroleum generated by organism is that certain paleogeo-temperature，buried depth and time continuity in geology are necessary for the generation of oil in large amounts from source rock strata.:after the deposition of organic matter，its composition，structure and nature will change regularly with an increase in thermal conditions. This regular change is known as organic evolution. Because organic evolution lasts throughout the whole course of sedi- mentary rock diagenesis, the division of its stages has a close relation to that of diagcneiic staccs, By rewving the caisiing slaw dividing models in China and foreign countries and according to thermal maluritu indicators we can divide it into the following stages. oil stage organism generating gas stage, immature oil stage,
Modern theory of petroleum generated by organism is that certain paleogeo-temperature，buried depth and time continuity in geology are necessary for the generation of oil in large amounts from source rock strata.:after the deposition of organic matter，its composition，structure and nature will change regularly with an increase in thermal conditions. This regular change is known as organic evolution. Because organic evolution lasts throughout the whole course of sedi- mentary rock diagenesis, the division of its stages has a close relation to that of diagcneiic staccs, By rewving the caisiing slaw dividing models in China and foreign countries and according to thermal maluritu indicators we can divide it into the following stages. oil stage organism generating gas stage, immature oil stage,
1983, 1(3): 69-78.
Abstract:
According to geological features of epigenetic Uramum deposits at"low tem perature and hypergene",many experimenis in the synthesis of uraninite bave been made at 40°C,80°C and room temperature and under ordinary pressure, and thus an X -ray pattern of uraninite is obtained.
According to geological features of epigenetic Uramum deposits at"low tem perature and hypergene",many experimenis in the synthesis of uraninite bave been made at 40°C,80°C and room temperature and under ordinary pressure, and thus an X -ray pattern of uraninite is obtained.
1983, 1(3): 88-97.
Abstract:
The deeper water facies, a special type of sedim entary facies, is distrib uted in the carbonate platform with shallow water and very shallow water went of the Middle and Late Devonian, Hunan and Guangzi Provinces,environ-The deeper water facies is called intraplatform trough0 facies, which appears as a belt.
The deeper water facies, a special type of sedim entary facies, is distrib uted in the carbonate platform with shallow water and very shallow water went of the Middle and Late Devonian, Hunan and Guangzi Provinces,environ-The deeper water facies is called intraplatform trough0 facies, which appears as a belt.
1983, 1(3): 109-122.
Abstract:
This article refers to the distribution of uranium, thorium and potassium in the sedimentary rocks of several oil and gas-bearing basins in China. 211 samples have been analyzed, of which 132 belong to mud shale and 79 to other rocks. On the basis of the above data, the following ideas are conceived.
This article refers to the distribution of uranium, thorium and potassium in the sedimentary rocks of several oil and gas-bearing basins in China. 211 samples have been analyzed, of which 132 belong to mud shale and 79 to other rocks. On the basis of the above data, the following ideas are conceived.
1983, 1(3): 126-132.
Abstract:
The principle of the X-ray micro-Power diffraction method is that the X-ray is irradiated on the smooth surface of the sample to cause diffraction, and it has no obvious relation to the thickness of the sample. So the conventional sample framework can be replaced by a smooth shallow small trough. A small trough of 13mm 15mm 0.1mm and a sample amount of 30 milligrams are used in our experiments. 2. The carrier is made with a domestic light shale with strong absorption of fluid. Then it is coated with the clay sample immersed in ethylene glycol. The remaining ethylene glycol which has not got into the expansible layers can be absorbed by the carrier. Therefore, an oriented clay film for the analysis of Xray diffraction rapidly forms on the carrier. The advantages of this method are: the method of immersion is simple and can make the expansible layers be saturated to the last degree.Because of its strong absorption of fluid, an oriented clay film can form rapidly. It is obvious that it is a fast and reliable method, and treatment of the ethylene glyeol is greatly simp1ified.
The principle of the X-ray micro-Power diffraction method is that the X-ray is irradiated on the smooth surface of the sample to cause diffraction, and it has no obvious relation to the thickness of the sample. So the conventional sample framework can be replaced by a smooth shallow small trough. A small trough of 13mm 15mm 0.1mm and a sample amount of 30 milligrams are used in our experiments. 2. The carrier is made with a domestic light shale with strong absorption of fluid. Then it is coated with the clay sample immersed in ethylene glycol. The remaining ethylene glycol which has not got into the expansible layers can be absorbed by the carrier. Therefore, an oriented clay film for the analysis of Xray diffraction rapidly forms on the carrier. The advantages of this method are: the method of immersion is simple and can make the expansible layers be saturated to the last degree.Because of its strong absorption of fluid, an oriented clay film can form rapidly. It is obvious that it is a fast and reliable method, and treatment of the ethylene glyeol is greatly simp1ified.
